3 FILE : string.hh -- declare String
5 Rehacked by HWN 3/nov/95
7 introduced Class String_handle
14 // too darn slow with gcc3
23 #include "arithmetic-operator.hh"
24 #include "string-handle.hh"
28 Intuitive string class. provides
31 ref counting through #String_handle#
33 conversion from bool, int, double, char* , char.
35 to be moved to String_convert:
36 conversion to int, upcase, downcase
42 indexing (index_i, index_any_i, last_index_i)
45 cutting (left_string, right_string, mid_string)
51 signed comparison (<, >, ==, etc)
54 No operator[] is provided, since this would be enormously slow. If needed,
55 convert to char const* .
64 bool null_terminated ();
68 /** init to empty string. This is needed because other
69 constructors are provided.*/
73 String (char const* source);
74 String (Byte const* byte, int length_i);
76 /// return "new"-ed copy of contents
77 Byte* get_copy_byte () const;
78 char* get_copy_str0 () const;
80 char const* to_str0 () const;
81 Byte const* to_bytes () const;
85 String &operator = (String const & source);
88 void operator += (char const* s) { strh_ += s; }
89 void operator += (String s);
91 bool is_empty () const;
94 void prepend (String);
97 Return a char. UNSAFE because it may change strlen () result
99 char &operator [] (int n);
100 char operator [] (int n) const;
102 /// return n leftmost chars
103 String left_string (int n) const;
105 /// return n rightmost chars
106 String right_string (int n) const;
108 /// return the "esrever" of *this
111 /// return a piece starting at index (first char = index_i 0), length n
112 String cut_string (int index_i, int n) const;
114 /// cut out a middle piece, return remainder
115 String nomid_string (int index_i, int n) const;
117 /// signed comparison, analogous to memcmp;
118 static int compare (String const & s1,const String& s2);
120 /// index of rightmost c
121 int index_last (char c) const;
123 /// index of rightmost element of string (???)
124 int index_last (char const* string) const;
126 int index (char c) const;
128 /// index of leftmost occurance of STRING
129 int index (String) const;
132 int index_any (String) const;
137 #ifdef STREAM_SUPPORT
138 /// provide Stream output
139 void print_on (ostream& os) const;
142 /// the length of the string
145 /// convert to an integer
148 /// convert to a double
149 double to_double () const;
151 void substitute_char (char text, String sub);
155 better to clutter global namespace, than suffer *ugh, ugh, ugh*
156 implicit conversions.
158 it might be cool to have no type-checking at all in a language,
159 but once there is, having this silently circumvented is a nightmare.
161 whenever implicit conversions seem necessary (e.g. operator << ()),
162 use Scalar as the generic type iso String.
165 /// for completeness (=handy)
166 inline String to_string (String s) { return s; }
168 String to_string (char c, int n = 1);
169 String to_string (int i, char const* format = 0);
170 String to_string (double f, char const* format = 0);
171 String to_string (long b);
172 String to_string (bool b);
173 String to_string (char const* format, ... );
176 technically incorrect, but lets keep it here: this is a
177 catch all place for this stuff.
180 #include "international.hh"
183 #include "compare.hh"
184 INSTANTIATE_COMPARE (String const &, String::compare);
186 #ifdef STRING_UTILS_INLINED
188 #define INLINE inline
190 #include "string.icc"
191 /* we should be resetting INLINE. oh well. */
195 // because char const* also has an operator ==, this is for safety:
196 inline bool operator== (String s1, char const* s2)
198 return s1 == String (s2);
200 inline bool operator== (char const* s1, String s2)
202 return String (s1)==s2;
204 inline bool operator!= (String s1, char const* s2 ) {
205 return s1!=String (s2);
207 inline bool operator!= (char const* s1,String s2) {
208 return String (s2) !=s1;
211 IMPLEMENT_ARITHMETIC_OPERATOR (String, +);
212 #ifdef STREAM_SUPPORT
213 ostream &operator << (ostream& os, String d);